package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
  @Autowired
  private DishMapper dishMapper;
  @Autowired
  private DishFlavorMapper dishFlavorMapper;
  @Autowired
  private SetmealDishMapper setmealDishMapper;

  /**
   * 新增菜品和对应的口味数据
   * @param dishDTO
   */
  @Transactional
  public void saveWithFlavor(DishDTO dishDTO) {
    // 菜品表插入一条数据
    Dish dish = new Dish();
    BeanUtils.copyProperties(dishDTO, dish);
    dishMapper.insert(dish);

    Long dishId = dish.getId();
    // 口味表插入多条数据
    List<DishFlavor> flavors = dishDTO.getFlavors();

    if(flavors != null && flavors.size() > 0){
      flavors.forEach(flavor -> flavor.setDishId(dishId));
      dishFlavorMapper.insertBatch(flavors);
    }

  }

  @Override
  public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
    PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
    String name = dishPageQueryDTO.getName();
    Integer categoryId = dishPageQueryDTO.getCategoryId();
    Integer status = dishPageQueryDTO.getStatus();
    Page<DishVO> list = dishMapper.page(name, categoryId, status);
    long total = list.getTotal();
    List<DishVO> result = list.getResult();
    PageResult pageResult = new PageResult();
    pageResult.setTotal(total);
    pageResult.setRecords(result);
    return pageResult;
  }

  /**
   * 批量删除菜品
   * @param ids
   * @return
   */
  @Override
  @Transactional
  public void deleteBatch(List<Long> ids) {
    // 判断当前菜品是否存在起售中的
    ids.forEach(id -> {
      Dish dish = dishMapper.getDishById(id);
      if(dish.getStatus() == StatusConstant.ENABLE){
        throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
      }
    });
    // 判断当前菜品是否被套餐关联了
    List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
    if(setmealIds != null && setmealIds.size() > 0){
      throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
    }

    dishMapper.deleteBatchByIds(ids);// 批量删除菜品
    dishFlavorMapper.deleteBatchByDishIds(ids);// 批量删除菜品关联的口味数据

  }

  @Override
  public DishVO getById(Long id) {
    // 根据id查询菜品信息
    // 根据id查询菜品口味信息
    Dish dish = dishMapper.getDishById(id);
    List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

    DishVO dishVO = new DishVO();
    BeanUtils.copyProperties(dish, dishVO);
    dishVO.setFlavors(dishFlavors);
    return dishVO;
  }

  @Override
  @Transactional
  public void updateWithFlavor(DishDTO dishDTO) {
    // 菜品表直接修改，
    Dish dish = new Dish();
    BeanUtils.copyProperties(dishDTO, dish);
    dishMapper.update(dish);

    // 口味表先删除再插入
    List<Long> ids = new ArrayList<>();
    ids.add(dishDTO.getId());
    log.info("删除菜品口味数据：{}", ids);
    dishFlavorMapper.deleteBatchByDishIds(ids);

    List<DishFlavor> flavors = dishDTO.getFlavors();
    if(flavors != null && flavors.size() > 0){
      flavors.forEach(flavor -> flavor.setDishId(dishDTO.getId()));
      dishFlavorMapper.insertBatch(flavors);
    }
  }

  /**
   * 根据分类id查询菜品
   *
   * @param categoryId
   * @return
   */
  public List<Dish> list(Long categoryId) {
    Dish dish = Dish.builder()
      .categoryId(categoryId)
      .status(StatusConstant.ENABLE)
      .build();
    return dishMapper.list(dish);
  }

  /**
   * 条件查询菜品和口味
   * @param dish
   * @return
   */
  public List<DishVO> listWithFlavor(Dish dish) {
    List<Dish> dishList = dishMapper.list(dish);

    List<DishVO> dishVOList = new ArrayList<>();

    for (Dish d : dishList) {
      DishVO dishVO = new DishVO();
      BeanUtils.copyProperties(d,dishVO);

      //根据菜品id查询对应的口味
      List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

      dishVO.setFlavors(flavors);
      dishVOList.add(dishVO);
    }

    return dishVOList;
  }
}
